Solar Cookers Jewish families celebrate Passover to commemorate the freedom and exodus of the Israelites (Jewish slaves) from Egypt during the reign of the Pharaoh Ramses II. When the Pharaoh Ramses II freed the Israelites, they fled so quickly that there wasn't time to bake their breads. Instead the Israelites packed the raw dough, which they quickly baked in the hot sun into hard crackers called Matzohs as they fled through the desert. The exodus of the Israelites took place over 3000 years
2.4 Principles of Solar Cooker Naturally, earth has its own energy budget that hits the surface of earth and reflected back to the atmosphere. Figure 2.0.6 show the amount and percentage of earth’s energy budget. Figure 2.4.1: Earth’s Energy Budget In this project, we use three principles which are focusing sunlight to evacuated tube, converting light energy to heat energy and trapping heat energy. 1. Focusing sunlight to evacuated tube: A reflected surface with high specular reflectivity is utilized
especially in the many rural and underdeveloped areas. Solar cookers have been in use for a number of years, and they play a major role in the lives of the people who use them. Previous research that has been conducted by bodies such as the South African Department of Minerals and Energy and Solar Cooking International, on the efficacy and environmental impact of solar cookers will be further explored. The possible advantages and drawbacks of these cookers will be discussed as well the various types that
source that is independent of the above problems is the prime of the day in the 21st century. The most promising alternative, especially in a sunlight-rich climate like South Africa’s, seems to be the sun’s radiation or what’s commonly known as “solar power”. Living in a developing country, like South Africa, poses more immediate problems that need to be solved. The betterment of the lives of those living in areas outside the national grid (in non-electrified areas) should be top priority. Therefore
Three types of heat transfers help solar cookers use the sun’s energy to cook food. Heat is always transferred from the warmer object to the cooler object. Heat is also transferred to and through some materials better than others. The three types of heat transfers are radiation, conduction, and convection. Convection is the heat transfer by movement through materials such as air or a liquid. Materials like these are called mediums. Convection is the primary way heat can be transferred through liquids
and a pencil. You remember hearing about how the sun’s heat can be harnessed to heat and cook your food. Eureka: solar cooking! Although one might think that solar cooking is a far fetched idea, the green movement has made solar cooking an actual energy alternative. In this research paper we will look at how this medium solar energy is used in solar cooking, and the many benefits. Solar energy has been around since the 1700s, it has recently made a strong comeback with the hunt for new energy sources
Rice cooker is an essential household appliance for almost every family. Thus the product should be designed ecologically since it’s used heavily, otherwise, it may lead to large ecological impact to our environment. Life Cycle Assessment is used to assess a product’s environmental impacts. This paper presents an LCA study for the complete life cycle of an electric rice cooker with the power 500Watts as the functional unit. 1 Introduction The whole life cycle of electric rice cooker was divided into
The Solar and Heliospheric Observatory or SOHO for short is a cooperative joint effort by the European Space Agency (ESA) and the U. S. National Aeronautics and Space Administration (NASA). The main mission of this project is to study the internal structure of the Sun, its extensive upper atmosphere, as well as to determine the origin and characteristics of the solar wind. The SOHO spacecraft was launched on December 2, 1995 where then it was directed to go about 930,000 miles sunward from the Earth
Uses of Solar Energy Ever since the dawn of time, the sun has been a resource we cannot live or do without, so its not such a shock that man has come up with the idea of solar energy. Solar energy had many uses. Some can be dangerous and some, a very valuable asset to the modern world. Solar energy is energy derived from the sun in a form of ultra-violet rays. Its was first applied to use in 212 B.C., by the Greek genius Archimedes. Solar energy was used to defend the habor of Syracuse
Why Do We Need Solar Energy? With the world’s natural resources depleting rapidly, humans must find a way to compensate. This society has milked oil, coal, gasoline, lead, uranium, and many other of these reservoirs in our Earth for hundreds of years and much has been done. Asphalt was used for our roads and highways, coal was originally used for heat before there was oil, and even water was used as a form of electricity on many rural farms. Luckily, more companies around the world are waking up
The Solar Tent uses both passive energy and active energy. It’s passive energy because of its tent design that regulates a perfect environment for living, and active energy because it uses the solar hot water systems. The main purpose of the product is to provide temporary shelter in case natural and man-made calamities (i.e. earthquakes, landslides, floods ...); it is also use for family outings and other camping activities. It’s also beneficial for mountain climbing enthusiast to have a momentary
Planets and Solar System "A planet is a celestial body that revolves around a central star and does not shine by its own light " (Grolier, 1992). The only planetary system that is known to man is our solar system. It is made up of nine planets which range in size and make-up. The nine major planets in our solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. There are also many other minor planets which are also in our solar system, but they are unimportant
Solar Cell Experiment Aim: To see how individual factors affect the output of a solar cell. Factors affecting the output of a solar cell: This experiment is going to be performed in the confines of a school laboratory, and so the complexity and cost of the experiment(s) should reflect this. However, to see how different factors affect the solar cell output, I will need to perform at least two experiments. The question is, which ones? · Distance from the light source will affect the
Solar System Humans live on a small planet in a tiny part of a vast universe. This part of the universe is called the solar system, and is dominated by a single brilliant star-the sun. The solar system is the earth’s neighbourhood and the planets Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto are the Earth’s neighbours. They all have the same stars in the sky and orbit the same sun. Scientists believe the solar system began about 5 billion years ago, perhaps when a nearby
Solar Energy ~Some history, types, and facts~ In this modern fast paced world that we live in, there are many issues that are looked over, energy is one of these. As a world, we are dependant on dwindling fossil fuel supplies and take for granted electricity, oil, and gas. There are four completely renewable sources of energy around us that should be used and developed, they are: wind, growing plants, flowing water, and the sun. These sources of energy are the ones we should be tapping,
The Solar System What are planets? Planets are kinda like asteroid around the sun. There are nine planets in the solar system, Mercury, Venus, Earth ( Our planet ), Mars, Jupiter, Saturn,Uranus, Neptune, and Pluto. The Terrestrial Planets The terrestrial planets are the four innermost planets in the solar system, Mercury, Venus, Earth and Mars. They are called terrestrial because they have a compact, rocky surface like the Earth's. The planets, Venus, Earth, and Mars have significant atmospheres
History of Solar Energy Even though most people think solar energy is a recent invention, it has been around for centuries, even in ancient times. Efforts to design and construct devices for supplying renewable energy began 100 years before the height of the Industrial Revolution. Engineers and scientists worried about what would happen to the world’s nations after using up the fuel supply. Most of the environmental visionaries realized that the potential rewards of solar power outweighed
An Investigation Into the Factors Affecting the Voltage Output of a Solar Cell My aim is to try and find out how much the voltage is affected when exposing different sized areas of a solar cell to a light source. From this I will also establish the energy of each photon and approximately, the number of freed electrons, which can make an electric current flow. I know that light consists of packets or quanta of energy called photons. When electromagnetic radiation such as light shines on
Solar cells Solar cells today are mostly made of silicon, one of the most common elements on Earth. The crystalline silicon solar cell was one of the first types to be developed and it is still the most common type in use today. They do not pollute the atmosphere and they leave behind no harmful waste products. Photovoltaic cells work effectively even in cloudy weather and unlike solar heaters, are more efficient at low temperatures. They do their job silently and there are no moving parts to wear
The Effect of Intensity on the Power of Solar Cells This experiment involves changing the intensity of light falling on different cells and measuring their power outputs. Higher intensity of light means that there are more photons hitting the surface of the cell per unit area per second. The more hit the cell, the more rapidly the electrons move across the p-n junction, so the larger the emf produced. If the rate of movement of electrons is inhibited, then the greater